207473223661 has 12 divisors (see below), whose sum is σ = 230400115036. Its totient is φ = 186667557120.

The previous prime is 207473223653. The next prime is 207473223667. The reversal of 207473223661 is 166322374702.

It can be written as a sum of positive squares in 2 ways, for example, as 77732785636 + 129740438025 = 278806^2 + 360195^2 .

It is not a de Polignac number, because 207473223661 - 2³ = 207473223653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (207473223667) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8826690 + ... + 8850163.

Almost surely, 2^207473223661 is an apocalyptic number.

It is an amenable number.

207473223661 is a deficient number, since it is larger than the sum of its proper divisors (22926891375).

207473223661 is a wasteful number, since it uses less digits than its factorization.

207473223661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17676972 (or 17676961 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 43.

It can be divided in two parts, 207473 and 223661, that added together give a palindrome (431134).

The spelling of 207473223661 in words is "two hundred seven billion, four hundred seventy-three million, two hundred twenty-three thousand, six hundred sixty-one".